Finding the Fourth Proportional to 1,061.60, 1,465.16 and 619.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.60 : 1,465.16 = 619.34 : x
2. Step 2: Convert to fraction form
   1,061.60/1,465.16 = 619.34/x
3. Step 3: Cross multiply
   1,061.60x = 1,465.16 × 619.34
4. Step 4: Simplify right side
   1,061.60x = 907,421.77
5. Step 5: Solve for x
   x = 907,421.77/1,061.60
6. Step 6: Final answer
   x = 854.77